Moderated Coin Flipper

[Wudang]

Welcome back from your hiatus. May I draw your attention to the question above?

 

[bruto]

I just read somewhere that an actual coin, owing to weight bias, is actually slightly more likely to land on heads than on tails. Any thoughts on that one?

 

[Wudang]

Sounds reasonable. Professional gambling dice, by the same logic, usually have the "spots" filled in to keep them as close to perfect cubes as usual and thus even out the chances of each side. Here is a set of standards to test dice link
My reading of the thread, such as I can understand it, is that OP has done the equivalent of making his own dice with a limited knowledge of amy standards, rolled them and when they show bias instead of acknowledging his dice are flawed, claims statistics is wrong.
Again, as I understand it and I wecome clarification and where required correction.

 

[P.J. Denyer]

Sounds reasonable. Professional gambling dice, by the same logic, usually have the "spots" filled in to keep them as close to perfect cubes as usual and thus even out the chances of each side. Here is a set of standards to test dice link
My reading of the thread, such as I can understand it, is that OP has done the equivalent of making his own dice with a limited knowledge of amy standards, rolled them and when they show bias instead of acknowledging his dice are flawed, claims statistics is wrong.Again, as I understand it and I wecome clarification and where required correction.

As a fellow non-participant in this thread that would pretty much be my reading too.

 

[Wudang]

May I ask, as others have, if OP can clarify what he believes he has demonstrated with his coin flipper? I am unable to determine this with any certainty after reading the thread.

My opinion, as a professional progammer since 1984, is that he has written a pseudo random number generator and the equivalent of a unit test for it. The test demonstrates that the PRNG has issues. I may have missed something so would appreciate clarification.

Is OP going to clarify?

 

[JoeMorgue]

I just read somewhere that an actual coin, owing to weight bias, is actually slightly more likely to land on heads than on tails. Any thoughts on that one?

Depends on the coin, but in most cases yes. Generally speaking the front of coins are more detailed which makes them lighter since more material is removed to make that detail, making the back end heavier, making it VERY, VERY SLIGHTLY more likely to land heads up.

https://www.snexplores.org/article/...y found that a coin,very different from 50-50.

https://www.smithsonianmag.com/scie...ds-in-a-coin-flip-arent-quite-5050-145465423/

There's also a similar issue with no matter how hard you flip a coin, there is, again we're talking tiny differences in probably over thousands of flips, a greater chance that a coin will land in the same orientation it had at the beginning of the flip.

https://www.business-standard.com/a...really-a-50-50-game-study-112120300282_1.html

 

[Wudang]

May I ask, as others have, if OP can clarify what he believes he has demonstrated with his coin flipper? I am unable to determine this with any certainty after reading the thread.

My opinion, as a professional progammer since 1984, is that he has written a pseudo random number generator and the equivalent of a unit test for it. The test demonstrates that the PRNG has issues. I may have missed something so would appreciate clarification.

Ahem.

 

[Wudang]

May I ask, as others have, if OP can clarify what he believes he has demonstrated with his coin flipper? I am unable to determine this with any certainty after reading the thread.

My opinion, as a professional progammer since 1984, is that he has written a pseudo random number generator and the equivalent of a unit test for it. The test demonstrates that the PRNG has issues. I may have missed something so would appreciate clarification.

Originally asked 10th June.